#include <stdio.h>
#include <math.h>

#define PI 3.1415926

/*
int main()
{
	int r = 10;
	double t = 1 * PI * r;

	printf("t=%f\n", t);
	return 0;

}
*/


/*
int main()
{
	int t,a = 12;
	t = a += a -= a * a;
	printf("t=%d\n", t);
	return 0;
}
*/

/*
int main()
{
	int a, b;
	int(25 % 5.0);
}
*/